Zn ALLOY PARTICLE FOR HIGHLY ANTICORROSIVE AND RUST-INHIBITING PAINT HAVING FRACTURED SURFACE, PROCESS FOR PRODUCTION OF THE PARTICLE, HIGHLY ANTICORROSIVE AND RUST-INHIBITING PAINT, AND HIGHLY CORROSION-RESISTING STEEL MATERIAL AND STEEL STRUCTURE

PROBLEM TO BE SOLVED: To provide highly anticorrosive and rust-inhibiting paint which can impart excellent rust-inhibiting properties and anticorrosive properties over a period longer than that in the conventional one to a steel material, and having coating properties and cost effectiveness. SOLUTION: Disclosed are Zn alloy particles for highly anticorrosive and rust-inhibiting paint, characterized by containing 0.01 to 30% by mass of Mg with the balance consisting of Zn and unavoidable impurities and by having physically fractured surfaces and/or cracks of 0.01 μm or above in length or in depth, a mean particle size of 0.05 to 200 μm, and an average of aspect ratios (of maximum diameter/minimum diameter) of 1 to 1.5. The Zn alloy particles comprise one or two selected from 0.01 to 30% Al and 0.01 to 3% Si. Also disclosed are highly anticorrosive and rust-inhibiting paint containing the particles, and highly corrosion-resisting steel material and steel structures coated with the paint. COPYRIGHT: (C)2009,JPO&INPIT